64650455405646 has 384 divisors, whose sum is σ = 157846738452480. Its totient is φ = 17436267878400.

The previous prime is 64650455405633. The next prime is 64650455405651.

64650455405646 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 64650455405646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 13936288995 + ... + 13936293633.

It is an arithmetic number, because the mean of its divisors is an integer number (411059214720).

Almost surely, 2^{64650455405646} is an apocalyptic number.

64650455405646 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64650455405646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78923369226240).

64650455405646 is an abundant number, since it is smaller than the sum of its proper divisors (93196283046834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64650455405646 is a wasteful number, since it uses less digits than its factorization.

64650455405646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 207360000, while the sum is 60.

The spelling of 64650455405646 in words is "sixty-four trillion, six hundred fifty billion, four hundred fifty-five million, four hundred five thousand, six hundred forty-six".